September 23 sees frequent showers in Hong Kong. Historical data shows a 45% chance of rain, so pack accordingly. Temperatures average 29°C. Expect a bustling atmosphere in Hong Kong right now—this is when the city truly comes alive with visitors.
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Essential Travel Info for Hong Kong
Currency
HKD
$ Hong Kong dollar
Language
English
+1 more
Driving
Left side
Connect
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Hong Kong Weather Forecast for September 23
"Warm & Sunny. Expect average highs of 28.7°C. 45% chance of rain."
What to Wear in Hong Kong in September
Based on historical data for September 23, Hong Kong typically experiences temperatures between 24.9°C and 28.7°C. We recommend packing t-shirt, light clothing, umbrella to stay comfortable. With a 45% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Hong Kong
Smart Suitcase
- T-Shirt
- Light Clothing
- Umbrella
Average High
28.7°C
Daytime Peak
Average Low
24.9°C
Nighttime Low
Feels Like
34.5°C
🔥 Heat index effect
Rain Chance
45%
Avg 4mm if it rains
Cloud Cover
60%
Light drizzle
Pressure
1010 hPa
Medium volatility
Hong Kong Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
✓ This date historically delivers consistent weather 76% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
06:00 - 10:00
16:00 - 18:00
Type I-II
🔴 25 min to burn
Type III-IV
🟡 38 min to burn
Type V-VI
🟢 63 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
25.5°C
Humid/Sticky
Heat Index
34.5°C
Feels hotter
😕 Best outdoor time:
Morning hours (before 11 AM)
Marine Conditions
Jellyfish Warning
High water temps may attract jellyfish swarms.
Swim Index
⚠️ Mixed Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Hong Kong
Flight Traffic
High
85/100 pressure index
Health Advisory
Healthy
Routine only • View Details →
Landing Slots
~967
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Hong Kong
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:13
☀️ Noon
12:17
🌇 Sunset
18:21
⏱️ Daylight
12h 7m
Wind Speed
16.2 km/h
Gentle breeze
Sunshine
8.8 hrs
Direct Sun (Cloud-free)
Humidity
83%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Hong Kong
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in Hong Kong
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Mild discomfort possible for arthritic conditions.
Moderate fish activity expected.
Unhealthy. Everyone should reduce outdoor activities.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
Typhoon Risk
Year-round risk present
Travel Alert: This region has elevated natural risks. We recommend registering with your embassy and keeping emergency numbers handy.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Hong Kong on September 23 averages 28.7°C with a 45% precipitation probability. Wedding/Outdoor Event Score: 82/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Hong Kong Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
September 27
29.2°C • 30% rain
Score
90
September 28
29.4°C • 32% rain
Score
89
September 29
29.3°C • 32% rain
Score
89
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (September 23) in other destinations
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📍 Is Hong Kong Worth Visiting on September 23?
Planning a trip to Hong Kong on September 23? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 28.7°C with a 45% historical precipitation risk.
✈️ Travel Logistics: Approximately 967 landing slots available daily during this period, indicating peak tourist activity.
🌊 Coastal Conditions: Water temperature averages 28.5°C (tropical bath). Wave conditions are generally fun waves with heights around 1m.
📊 Historical Extremes: The hottest September 23 recorded in the last 30 years saw temperatures hit 31°C in 2025, while the coldest dropped to 21.8°C in 2024.